source: josm/trunk/src/org/openstreetmap/josm/actions/OpenAction.java@ 729

// License: GPL. Copyright 2007 by Immanuel Scholz and others
package org.openstreetmap.josm.actions;

import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.zip.GZIPInputStream;

import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.gui.layer.OsmDataLayer;
import org.openstreetmap.josm.gui.layer.GpxLayer;
import org.openstreetmap.josm.gui.layer.markerlayer.MarkerLayer;
import org.openstreetmap.josm.io.OsmReader;
import org.openstreetmap.josm.io.GpxReader;
import org.xml.sax.SAXException;

/**
 * Open a file chooser dialog and select an file to import. Then call the gpx-import
 * driver. Finally open an internal frame into the main window with the gpx data shown.
 * 
 * @author imi
 */
public class OpenAction extends DiskAccessAction {
        
        /**
         * Create an open action. The name is "Open a file".
         */
        public OpenAction() {
                super(tr("Open ..."), "open", tr("Open a file."), KeyEvent.VK_O, InputEvent.CTRL_DOWN_MASK);
        }

        public void actionPerformed(ActionEvent e) {
                JFileChooser fc = createAndOpenFileChooser(true, true, null);
                if (fc == null)
                        return;
                File[] files = fc.getSelectedFiles();
                for (int i = files.length; i > 0; --i)
                        openFile(files[i-1]);
        }

        /**
         * Open the given file.
         */
        public void openFile(File file) {
                try {
                        if (asGpxData(file.getName()))
                                openFileAsGpx(file);
                        else
                                openAsData(file);
                } catch (SAXException x) {
                        x.printStackTrace();
                        JOptionPane.showMessageDialog(Main.parent, tr("Error while parsing {0}",file.getName())+": "+x.getMessage());
                } catch (IOException x) {
                        x.printStackTrace();
                        JOptionPane.showMessageDialog(Main.parent, tr("Could not read \"{0}\"",file.getName())+"\n"+x.getMessage());
                }
        }

        private void openAsData(File file) throws SAXException, IOException, FileNotFoundException {
            String fn = file.getName();
            if (ExtensionFileFilter.filters[ExtensionFileFilter.OSM].acceptName(fn)) {
                DataSet dataSet = OsmReader.parseDataSet(new FileInputStream(file), null, Main.pleaseWaitDlg);
                OsmDataLayer layer = new OsmDataLayer(dataSet, file.getName(), file);
            Main.main.addLayer(layer);
            }
            else
                JOptionPane.showMessageDialog(Main.parent, fn+": "+tr("Unknown file extension: {0}", fn.substring(file.getName().lastIndexOf('.')+1)));
    }

        private void openFileAsGpx(File file) throws SAXException, IOException, FileNotFoundException {
                String fn = file.getName();
                if (ExtensionFileFilter.filters[ExtensionFileFilter.GPX].acceptName(fn)) {
                        GpxReader r = null;
                        if (file.getName().endsWith(".gpx.gz")) {
                                r = new GpxReader(new GZIPInputStream(new FileInputStream(file)), file.getAbsoluteFile().getParentFile());
                        } else {
                                r = new GpxReader(new FileInputStream(file), file.getAbsoluteFile().getParentFile());
                        }
                        r.data.storageFile = file;
                        GpxLayer gpxLayer = new GpxLayer(r.data, fn);
                        Main.main.addLayer(gpxLayer);
                        if (Main.pref.getBoolean("marker.makeautomarkers", true)) {
                                MarkerLayer ml = new MarkerLayer(r.data, tr("Markers from {0}", fn), file, gpxLayer);
                                if (ml.data.size() > 0) {
                                        Main.main.addLayer(ml);
                                }
                        }

                } else {
                        throw new IllegalStateException();
                }
    }


        private boolean asGpxData(String fn) {
                return ExtensionFileFilter.filters[ExtensionFileFilter.GPX].acceptName(fn);
        }


}